If You Shared My Happiness, You Are Part of Me: Capitalization and the Experience of Couple Identity.

The way in which individuals react to a partner's disclosure of positive news (capitalization response) is associated with relational well-being. Two studies analyzed the role of couple identity in explaining the association between perceived capitalization responses and relationship quality. A daily diary study ( = 90 couples) revealed that on days people perceived their partners' responses as active-constructive, they reported higher levels of couple identity. A longitudinal two-wave study ( = 169 couples) showed that couple identity mediated the link between active-constructive (for both women and men) and passive-destructive responses (only for men) and relationship quality. Overall, our findings suggest that the experience of the partner's involvement and support in good times contribute to a sense of couple identity, which over the long turn, is associated with partners' relational well-being.